THE HISTORICAL
MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
 
 
 
 
 
 
2 entries match your criteria.  

 
 

Related Historical Markers

-- Two local observatories.
 
By Craig Baker, November 24, 2019
100-Inch Telescope Marker
SHOWN IN SOURCE-SPECIFIED ORDER
1 ► California, Los Angeles County, Angeles National Forest — The 100-Inch Hooker Telescope — Mount Wilson Observatory —
2 ► California, Los Angeles County, Pasadena — Hale Solar Laboratory —
 
 
  
  
  
 
 
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Nov. 11, 2026